In this handout photo released by Tham Luang Rescue Operation Center, Thai rescue teams walk inside cave complex where 12 boys and their soccer coach went missing, in Mae Sai, Chiang Rai province, in northern Thailand, Monday, July 2, 2018. Rescue divers are advancing in the main passageway inside the flooded cave in northern Thailand where the boys and their coach have been missing more than a week. (Tham Luang Rescue Operation Center via AP)